#循环遍历
for i in "hello":
    print(i)

#range(n,m) 产生[n，m）的整数
n = range(1,11)
print(type(n))
for i in n:
    print(i)

print("=================================")
i = 1
s = 0
while i<= 100:
    i+=1
    s+=i
print(s)
